Is MPLS Domain a single carrier, or two carriers. If two carriers then the CE3/CE4 site will see that they can't reach via CE3/CE1 path and switch over to CE4/CE2 path. If a single carrier, then the CE4/CE2 path needs to be via a second RD so that the paths within the carrier are preferred and the same will happen. PfR is providing end-to-end reachability information in this case, and based on that changing the local routing table.
David -- http://dcp.dcptech.com > -----Original Message----- > From: jack daniels [mailto:jckdaniel...@gmail.com] > Sent: Thursday, March 25, 2010 1:07 PM > To: David Prall > Cc: cisco-nsp@puck.nether.net > Subject: Re: [c-nsp] PFR Question > > But if you have -- > > > |CE1--------PE1 > PE3--------CE3 > X.X.X.X---------| --------------------MPLS DOMAIN----- > -------------- > | CE2--------PE2 > PE4--------CE4 > > > Now my primary link is CE1-PE1 and secondary is CE2-PE2 > If my CE1-PE1 goes down i route traffic via CE2-PE2<<<<<<I understand > this ok... > > when traffic from CE3 for X.X.X.X reaches PE3 , next hop is still PE1 ( > as MPBGP has not converged so fast in MPLS domain of SP) ...so how will > traffic be forwareded , as PFR claims 3 sec. > > > On Thu, Mar 25, 2010 at 10:16 PM, David Prall <d...@dcptech.com> wrote: > > > PfR is a unidirectional feature. The router on the other end > needs to be > configured with PfR as well in order to have bidirectional > visibility. > Typically the master controller will be local to the site. > > -- > http://dcp.dcptech.com <http://dcp.dcptech.com/> > > > > > -----Original Message----- > > From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp- > > boun...@puck.nether.net] On Behalf Of jack daniels > > Sent: Thursday, March 25, 2010 12:35 PM > > To: cisco-nsp@puck.nether.net > > Subject: Re: [c-nsp] PFR Question > > > > dear guys, > > > > is my mail being delivered to group as no one replied. > > > > On Wed, Mar 24, 2010 at 11:42 PM, jack daniels > > <jckdaniel...@gmail.com>wrote: > > > > > Hi Network champs, > > > > > > I'm stuck in understanding of PFR . Docs say it converges in > 3 sec ( > > for > > > realtime traffic VOICE )... > > > > > > I understand you can send traffic out secondry link but what > about > > traffic > > > which has to come back from remote end ( for which SP has not > > converged). > > > > > > But if you have -- > > > > > > > > > > > > |CE1--------PE1 > > > PE3--------CE3 > > > X.X.X.X---------| --------------------MPLS > > > DOMAIN------------------- > > > | CE2--------PE2 > > > PE4--------CE4 > > > > > > > > > Now my primary link is CE1-PE1 and secondary is CE2-PE2 > > > If my CE1-PE1 goes down i route traffic via CE2-PE2<<<<<<I > understand > > this > > > ok... > > > > > > > > > BUT MY QUESTION IS - > > > > > > PE3 and PE4 ( for this VRF) still has NOW converged the BGP > and still > > for > > > it next hop for X.X.X.X is PE1. So how fwd can happen in 3 > sec untill > > > Service providers all routers dont converge and understand > that CE1- > > PE1 link > > > is down. > > > > > > > > > Regards > > > > > > > > > _______________________________________________ > > cisco-nsp mailing list cisco-nsp@puck.nether.net > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
